Multi-stage precipitation device for recycling cadmium

Abstract

The utility model discloses a multistage precipitation device for cadmium recovery, which comprises a plurality of precipitation devices which are sequentially arranged from high to low, and the plurality of precipitation devices are used for carrying out stage-by-stage precipitation on alkali liquor for cadmium recovery. The three precipitation devices are respectively a first precipitation tank, a second precipitation tank and a third precipitation tank, a first hanging ring is arranged at the top of the first precipitation tank, a first baffle is arranged on one side close to a liquid outlet of the first precipitation tank, and a first liquid discharge valve is arranged at the bottom of the first precipitation tank; the first precipitation tank, the second precipitation tank and the third precipitation tank are the same in structure, and the heights of the first precipitation tank, the second precipitation tank and the third precipitation tank are sequentially reduced. Through the multi-stage sedimentation device, post personnel can be effectively liberated, the cleaning frequency of the alkaline residue pool is reduced, the labor intensity is reduced, the working efficiency is improved, and the occurrence possibility of safety accidents is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste recycling, in particular to a multi-stage precipitation device for cadmium recovery. Background Art

[0002] In the purification of copper-cadmium slag in hydrometallurgical zinc smelting, it is necessary to be processed in the cadmium recovery process to recover cadmium and enrich copper. The cadmium cakes produced by wet method of cadmium need to be reductively smelted in the crude cadmium furnace in the cadmium recovery process. In this process, it is necessary to reasonably add flake caustic soda to the crude cadmium furnace according to the actual production situation to block air and adsorb impurities. Whenever the crude cadmium furnace produces for a period of time, it is necessary to carry out slag discharging operation on the crude cadmium furnace. This slag is called alkali slag, which is mixed with unremoved small particles of crude cadmium (hereinafter referred to as cadmium particles). In order to reduce waste, improve the cadmium recovery rate and meet the environmental protection requirements, it is necessary to recycle the alkali slag.

[0003] At present, when recycling the alkali slag, an alkali slag pond is usually set up on site. The alkali slag is put into it, heated with water and stirred. After separating the cadmium particles from the alkali slag, due to the action of gravity, the cadmium particles and large particles of alkali slag basically precipitate at the bottom of the alkali slag pond, and the upper alkali liquid is transferred to the alkali liquid tank by a pump and sent to the wet cadmium process. In actual production, the on-site personnel not only need to clean the alkali slag pond in time periodically, but also need to re-clean the recycled cadmium particles. The on-site labor intensity is high and the efficiency is low. At the same time, the alkali liquid is corrosive and at a high temperature, and there are certain safety hazards in frequent cleaning. Content of the Utility Model

[0004] The utility model provides a multi-stage precipitation device for cadmium recovery. Through this device, on-site personnel can be effectively liberated, the frequency of cleaning the alkali slag pond can be reduced, the labor intensity can be reduced, the work efficiency can be improved, and the possibility of safety accidents can be reduced.

[0005] The technical solution provided by the utility model is as follows:

[0006] A multi-stage precipitation device for cadmium recovery includes a plurality of precipitation devices arranged in order from high to low. The plurality of precipitation devices are used for gradually precipitating the alkali liquid for cadmium recovery.

[0007] Further, the number of the precipitation devices is 3, which are a first precipitation tank, a second precipitation tank and a third precipitation tank respectively;

[0008] A first lifting ring is arranged at the top of the first precipitation tank, a first baffle is arranged on one side of the drainage port close to the first precipitation tank, and a first liquid discharge valve is arranged at the bottom of the first precipitation tank;

[0009] The first precipitation tank, the second precipitation tank and the third precipitation tank have the same structure and their heights decrease in turn.

[0010] Furthermore, the first sedimentation tank, the second sedimentation tank, and the third sedimentation tank are all arranged in the storage tank.

[0011] Furthermore, a storage tank valve is arranged on the storage tank.

[0012] Furthermore, a support frame is arranged in the storage tank, and the first sedimentation tank, the second sedimentation tank, and the third sedimentation tank are all arranged on the support frame.

[0013] Furthermore, a liquid inlet pipe is connected to the first sedimentation tank.

[0014] Furthermore, the top of the first baffle is flush with the top of the first sedimentation tank, and the height of the first baffle is 1 / 4 - 1 / 3 of the overall height of the first sedimentation tank.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The present utility model provides a multi-stage precipitation device for cadmium recovery. Through this multi-stage precipitation device, it is possible to effectively liberate the post personnel, reduce the frequency of cleaning the alkali residue pond, reduce the labor intensity, improve the work efficiency, and reduce the possibility of safety accidents. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the multi-stage precipitation device for cadmium recovery in the embodiment of the present utility model.

[0018] The reference numerals are as follows:

[0019] 1 - liquid inlet pipe, 2 - storage tank, 3 - first sedimentation tank, 31 - first lifting ring, 32 - first baffle, 33 - first liquid discharge valve, 4 - second sedimentation tank, 41 - second lifting ring, 42 - second baffle, 43 - second liquid discharge valve, 5 - third sedimentation tank, 51 - third lifting ring, 52 - third baffle, 53 - third liquid discharge valve, 6 - support frame, 7 - storage tank valve. Detailed Embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0021] Accordingly, the detailed description of the embodiments of the present application provided below in conjunction with the accompanying drawings is only intended to represent selected embodiments of the present application and does not limit the scope of protection required by the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0022] It should be understood that in the description of the embodiments of the present utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0023] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0024] Referring to Figure 1 , the present application provides a multi-stage precipitation device for cadmium recovery, including a plurality of precipitation devices arranged in descending order from right to left and from high to low. The plurality of precipitation devices are used for gradually precipitating the alkaline solution for cadmium recovery.

[0025] Optionally, the number of precipitation devices can be 3, or can be set to 2, 4 or 5 according to requirements. In this embodiment, 3 precipitation devices are taken as an example for elaboration. The 3 precipitation devices are respectively defined as the first precipitation tank 3, the second precipitation tank 4 and the third precipitation tank 5.

[0026] At the top of the first sedimentation tank 3, a first lifting ring 31 is provided. On one side close to the liquid discharge port of the first sedimentation tank 3, a first baffle 32 is provided. At the bottom of the first sedimentation tank 3, a first liquid discharge valve 33 is provided.

[0027] The first sedimentation tank 3, the second sedimentation tank 4 and the third sedimentation tank 3 have the same structure and their heights decrease in sequence. It can be understood that the distance between the first sedimentation tank 3, the second sedimentation tank 4 and the third sedimentation tank 3 should not be too far. When the first sedimentation tank 3 is filled with liquid, it can flow by gravity from the left liquid discharge port into the second sedimentation tank 4. When the second sedimentation tank 4 is filled with liquid, it can flow by gravity from the left liquid discharge port into the third sedimentation tank 5.

[0028] Specifically, at the top of the second sedimentation tank 4, a second lifting ring 41 is provided. On one side close to the liquid discharge port of the second sedimentation tank 4, a second baffle 42 is provided. At the bottom of the second sedimentation tank 4, a second liquid discharge valve 43 is provided. At the top of the third sedimentation tank 5, a third lifting ring 51 is provided. On one side close to the liquid discharge port of the third sedimentation tank 5, a third baffle 52 is provided. At the bottom of the third sedimentation tank 5, a third liquid discharge valve 53 is provided.

[0029] Optionally, the first sedimentation tank 3, the second sedimentation tank 4 and the third sedimentation tank 5 are all arranged in the storage tank 2.

[0030] Optionally, a storage tank valve 7 is provided at the left bottom of the storage tank 2.

[0031] Optionally, a support frame 6 is provided in the storage tank 2. The first sedimentation tank 3, the second sedimentation tank 4 and the third sedimentation tank 5 are detachably arranged on the support frame 6.

[0032] Optionally, a liquid inlet pipe 1 is connected to the right side of the first sedimentation tank 3.

[0033] Optionally, the top of the first baffle 32 is flush with the top of the first sedimentation tank 3, and the height of the first baffle 32 is 1 / 4 - 1 / 3 of the overall height of the first sedimentation tank 3. Setting the height of the first baffle 32 to 1 / 4 - 1 / 3 of the overall height of the first sedimentation tank 3 can achieve a good blocking effect without affecting the flow of the lye to the next sedimentation tank.

[0034] The usage method of the multi-stage precipitation device for cadmium recovery provided by this application is as follows:

[0035] When the lye is needed, it enters the first sedimentation tank 3 from the liquid inlet pipeline 1 for natural sedimentation. The first baffle 31 blocks the un-sedimented lye. After a period of time, the lye flows by gravity to the second sedimentation tank 4 for further sedimentation. The clarified liquid then enters the third sedimentation tank 5 for sedimentation. Finally, the lye without slag flows by gravity to the storage tank 2, and the operator on duty opens the valve 7 as needed to transport it to the lye transfer vehicle. When there is a large amount of sediment in a certain sedimentation tank, use the overhead crane to lift it to the cadmium granule cleaning area under the action of the corresponding lifting ring, clean the cadmium granules in the sedimentation tank, and open the corresponding liquid discharge valve to discharge the cadmium granules, alkali sludge and cleaning water in the sedimentation tank. For example, when there is a large amount of sediment in the first sedimentation tank 3, use the overhead crane to lift it to the cadmium granule cleaning area under the action of the first lifting ring 31, clean the cadmium granules in the first sedimentation tank 3, and open the first liquid discharge valve 33 to discharge the cadmium granules, alkali sludge and cleaning water in the sedimentation tank. After cleaning, just put the first sedimentation tank 3 back in place.

[0036] As described above, it is only the specific implementation mode of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claimed rights.

Claims

1. A multi-stage precipitation device for cadmium recovery, characterized in that: It includes a plurality of precipitation devices arranged from high to low, and the plurality of precipitation devices are used for step-by-step precipitation of the lye for cadmium recovery; The number of the precipitation devices is 3, namely a first precipitation tank, a second precipitation tank and a third precipitation tank; A first lifting ring is arranged at the top of the first precipitation tank, a first baffle is arranged on one side of the liquid discharge port close to the first precipitation tank, and a first liquid discharge valve is arranged at the bottom of the first precipitation tank; The first precipitation tank, the second precipitation tank and the third precipitation tank have the same structure and the heights decrease in sequence.

2. The multi-stage precipitation device for cadmium recovery according to claim 1, characterized in that: The first precipitation tank, the second precipitation tank and the third precipitation tank are all arranged in a reserve tank.

3. The multi-stage precipitation device for cadmium recovery according to claim 2, characterized in that: A reserve tank valve is arranged on the reserve tank.

4. The multi-stage precipitation device for cadmium recovery according to claim 2 or 3, characterized in that: A support frame is arranged in the reserve tank, and the first precipitation tank, the second precipitation tank and the third precipitation tank are all arranged on the support frame.

5. The multi-stage precipitation device for cadmium recovery according to claim 4, characterized in that: The first precipitation tank is communicated with a liquid inlet pipeline.

6. The multi-stage precipitation device for cadmium recovery according to any one of claims 1-3, characterized in that: The top of the first baffle is flush with the top of the first precipitation tank, and the height of the first baffle is 1 / 4-1 / 3 of the overall height of the first precipitation tank.

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